Amplifier Technology Incorporated's John Baloff showed me their new 4007 class-D amplifier during a brief visit to their room. "Baby brother" to the company's 6000 amplifier, the 4007 ($2995 for the 2-channel version; the amplifier is available in 4-, 8- or 12 channel versions) delivers 180Wpc into 8 ohms, using new "extremely quiet" NCore class-D modules.